Improvement in treatment of flour



A. HUN Treatment` our.

|\| .2o9544.v Patented May-14,1878.

,i V ITE @mg U l l I l l V 'Y Specification forming part of Letters Patent .andfuseful Process forPurifying and Separat- 7 f'MPROVEMENT-*INTRATMENfor"FrURgi-f To allfwhomit may concern.: l Beit known 'that I, ANDREW HUNTER, of the city of Rochester, in the county of Monroe and` State of New York, have invented a new ing Impurities from Flour, which `process is fully set forth in the following specification. j

In the old system of milling it was the aim of millers to make as large a quantity of first.

iiourr as possible, whichsystem .was termed low grinding. By grinding low it necessi- Jrated the pulverization of the iibrous particles and other impurities, which became so thoroughly incorporated with the flour it was impossible to make a perfect separation by the use of bolts. Said separation consisted usually in making three grades of flour.

In the new system of milling an entirely different result is produced. It is now the aim of millers to make as little first iiour as possible, not averaging over one-halfof the ilour contained in the wheat. Therefore the iirst run is darker, containing more fibrous matter than the first ilour made by the old system.

Since the adoption of the granulating system of grinding, about fifty per cent. of middlings is made, composed of the coarse granular particles of wheat.

In the new process of manufacturing flour itis necessary to use purifiers to remove the fiber and light specks by a blast of wind, the dierence between the specific gravity of the middlings and fiber being so greatthat with an ordinary purifier good results are obtained. There is a coarse brown middlings, composed, in part, of the white part of the berry of the wheat and the germ and particles of bran, that requires to be regroimd or crushed, so as to free the white part containing flour from the brown particles. By using the ordinary stone to reduce it, so that the purifier can operate on the material properly, it has been found that the germ was reduced to the same consistency of the white particles. Therefore it was necessary to adopt rolls for the reduction of the coarse brown middlings, which has proved a success in the reduction ofcoarse'middlings.

In making the fu'st run of flour from high grinding it is usually coarse, and contains all the nutritious properties found in the new-process iiour; but in order to bring it up to the N0. 203,544, dated May. 14, 1878; application filed"v g"` n.'Marcl.12,5,1878..,u.-A*1V ,y i

same standardit isnecessary .00 remove the iiberand other impurities that are incorpo-L; lrated in minute particles.l There beingso lit: v itle die'rence in their specic gravity, Ait has @been considered impossible to remove them,` and all attempts. to do so have proved futile. s The processes heretofore employed are used onlr in the different stages of manufacturing the flour.

mate, at least one dollar per barrel. The rst part of the operation of purifying and refining is to mix, if desired, clean coarse middlings with the fiour, in order to make it bolt freely, then pass the iiour through a bolt covered with suitable cloth, for the purpose of separating the starchy part, thereby producing awhite soft fiour of but little value for family use. The starchy part, when separated, leaves a granular iour, composed, principally, of gluten, combined with the fiber and other impurities.

The above separation made by bolting is, to the best of my knowledge, the extent of refining as practiced by millers.

In order to separate the fiber and other impurities from the granular iiour, it can only' be accomplished by the action of Wind by applying a pressure-blast under the cloth of the sieve, to prevent the fiber from passing through with the puried iiour, said blast having sufiicient force to carry the fuzzy particles to a receptacle prepared for the same.

In order to carry out this system of purifying or rening, I find it necessary to separate the ne particles of germ and other similar impurities ,usually composed of an oily substance by passing into or through rolls composed of porcelain, or through a set of burrstones adapted for that purpose, the germ and other impurities will be flattened, and the coarse granular iiour reduced to the proper consistency preparatory to entering a bolt. As it passes through said bolt the iiour is thoroughly removed through the meshes of the cloth in a pure state, ready for mixing with the flour separated by the first bolt in the rst operation of my process.

I will now describe my mode of rening and 4Wherein mynew process differs from all oth-A Iers I take the manufactured product kno-wn as ylow-grade and first-run flour? and purify and?h refine it, raising the flour in value, as I estipurifying, referring to the accompanying drawings to illustrate. l

Figure lis a sectional view, showing an ordinary bolt; Fig. 2, an end view of my puriiier; Fig. 3, rolls; Fig. 4, a sectional view of a bolt.

The rst run of our orlow grades are mixed, if desired, with coarse middlings and run into reel A, Fig. 1, covered with suitable cloth. The line white flour is removed throughthe meshes. The coarse part runs over the end, thoroughly dusted and free from soft fme our. The coarse part is run onto my purier B, Fig. 2. The our is fed evenly on the end of the screen. As it travels over, it gradually sifts through. The ber and fuzzy particles are held in suspension and prevented from going through the cloth by a pressure of Wind under the sieve, supplied by a fan or fans. The air, as it is forced through the cloth, removes and carries oft' with it the light impure matter, leaving the puried flour free from all light impurities. The purified ilour is next run into or through rolls c, Fig. 3. The object of the rolls is to atten small particles of germand other oily substances; also to reduce the coarse particles of flour to the proper lineness, theref by whitening the same. The flour, after passing through the rolls, is run into bolt D, FigV 4. As the bolt revolves the fiour is forced through the meshes of the cloth, and the ilattened particles pass oft' over the end. The impurities that run off over the end are fit for nothing but feed. The our separated by bolt f D is run with the flour taken from reel A, and thoroughly mixed, thereby making a ne white nutritious ilour from the first run and low grades, that has always sold for a low price, on account of the impurities contained therein, which could not be removed by a reel, nor any other method, and only by the process as above described.

The following is claimed as new, namely:

The process of rening the first run or low grade of flour, consisting in first passing it through a bolt to remove fine white ilour, then I through a purifier to remove ber or fuzz, then through rolls to flatten the germ and oily substances, through another bolt to remove flatv tened particles and impurities, and finally running the rened lour from the two bolts together.

v ANDREW HUNTER.

Witnesses:

A. NORTON FITCH, E. A. MGMATH. 

